Instead of a new email message or calendar item, you can create quick memos to yourself which will appear in the Inbox for ready reference. You can then save this Post in any of your email folders as if it were an email message.

This feature is available in both OWA and Outlook 2007.

Click on the drop down arrow next to the New button and Post in This Folder. (Also you can create a note by going through the File>New>Post in this Folder menu choices).

Type a subject and make your notes. You can save your notes as you go along by hitting CTRL-S. Each time you do this you’re saving a copy in your Inbox. To finish, click the button in the upper left that says Post.

To revise it once you’ve posted it, open it then click Other Actions... and then Revise Contents.